There is widespread policy concern with high rates of unintended teenage pregnancy in the UK, the highest in Western Europe. Social disadvantage and teenage pregnancy are strongly related. This review systematically examines research relating to policy initiatives aimed at tackling the social exclusion associated with unintended teenage pregnancy and young parenthood. Two separate reviews of evidence were conducted: a review of evidence relating to the prevention of unintended pregnancy; and a review of the research evidence relating to the support of teenage parents. This systematic review was published by EPPI-Centre in 2006. Systematic reviews aim to find as much as possible of the research relevant to the particular research questions, and use explicit methods to identify what can reliably be said on the basis of these studies.